We design a weather monitoring network in Bogotá, Colombia, using semiconductor devices, Arduino platform, and plotting software developed with open source software processing. Using some open license schematics, teams of high school physics teachers and students build Arduino-based interfaces and plotting/data storage software to install and set up meteorological stations at several schools along the city. We obtain temperature, wind velocity, humidity, barometric pressure and precipitation vs. time plots over variable time intervals to study weather behavior in our city.